A GEM-TPC in twin configuration for the Super-FRS tracking of heavy ions at FAIR
García, F., Caesar, C., Grahn, T., Heggen, H., Hoffmann, J., Jokinen, A., . . . Winkler, M. (2018). A GEM-TPC in twin configuration for the Super-FRS tracking of heavy ions at FAIR. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 884, 18-24. doi:10.1016/j.nima.2017.11.088
Published inNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Kaya, C. |
Kurz, N. |
Voss, B. |
© 2018 Elsevier Ltd. This is a final draft version of an article whose final and definitive form has been published by Elsevier. Published in this repository with the kind permission of the publisher.
The GEM-TPC  described herein will be part of the standard beam-diagnostics equipment of the Super-FRS  . This chamber will provide tracking information for particle identification at rates up to 1 MHz on an event-by-event basis. The key requirements of operation for these chambers are: close to 100% tracking efficiency under conditions of high counting rate, spatial resolution below 1 mm and a superb large dynamic range covering projectiles from Z=1 up to Z=92. The current prototype consists of two GEM-TPCs inside a single vessel, which are operating independently and have electrical drift fields in opposite directions. The twin configuration is done by flipping one of the GEM-TPCs on the middle plane with respect to the second one. In order to put this development in context, the evolution of previous prototypes will be described and its performances discussed. Finally, this chamber was tested at the University of Jyväskylä accelerator with proton projectiles and at GSI with Uranium, Xenon, fragments and Carbon beams. The results obtained have shown a position resolution between 120 to 300 μm at moderate counting rate under conditions of full tracking efficiency. ...